Type-writing machine.



No. 855,832. IPATENTED JUNE 4, 1907'.

A T BROWN TYPE WRITING MACHINE. APPLIUATION FILED AUG. 8, 1905.

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levers, the 'forwardxliy UNITED STATES PATENT oEEIoE. ALEXANDER T. BROWN, F SYRACUSE, NEW YORK. TYPE-WRITING. MACHINE.

Spem ification of Letters Patent.

Patented June 4, 1907.

Original application filed June 29,19045Berial No. 214,624. Divided and this application filed August 8, 1905. Serial No. 273,298.

To aZZ whom it may concern.-

Be it known that I, ALEXANDER T. BRowN, a citizen of the United States, and a resident of Syracuse, in the county of Onondaga'and State of New York, have invented certain newand useful Improvements in Type-Writing Machines, of which the following is .a specification.

My invention relates to typewriting ma chines and more especially to the carriages of such machines. 3

One of the objects of my inventionis to provide a typewriting machine, the carriage feeding and returning mechanism of which may be readily geared up for use, in Writing either a language such as English, which is written from left to right, or a language suchas Arabic, which is written from right to left, without requiring any changes in the framework, and requiring a minimum change in the mechanism, to adapt the machine to one language or another.

The present application is a'division of my prior application, Serial No. 214,624, filed June 29th, 1904. p

, One embodiment of my invention is illustrated in the accompanying drawings, in which,

Figure 1 is a vertical sectional view of a typewriting machine, the section being 2 is a rear elevation of said machine as arranged for writing Arabic. Fig. 3 is a detail rear elevation showing the parts arranged for writing English.

I have shown my invention applied to a front strike typewriter, the main frame of which comprises a base portion 1, from which rise posts 2 which support 'a top plate 3 on which is mounted a-rail 4 having in its front and rear edges race-ways which co-operate with corresponding race-ways in the carriage 5, which is supported by anti-friction balls or' rollers 6 which run in said race-ways. The platen 7 is mounted in the carriage, and types mounted on the upwardly and rearwardly striking type bars 8, strike against the front face of said platen. Said type bars are pivotally mounted on a segment 9 and are actuated by links 10 pivoted at one end to the type bars and at the other end to the upwardly extending arms 11 of bell crank sub extending arms 12 of which are connecte by links 13 to arms 14 mounted on rock shafts 15 which are journaled at their rear ends inthe base portion 1 of the mainframe and at their forward ends in frame plates 16. Said rock shafts are actuated by keys 17, the stems of which are pivoted to arms 18 on the rock shafts l5, and

said rock shafts are returned to normal position by springs 19 in a manner well known in the art. The bell cranks 11, 12 are pivotally mounted in hangers 20 mounted on a fixed segment 21, which is supported, by ears or brackets 22 depending from the top plate 3.

Each of said sub-levers has a rearwardly extending. arm 23 to which is connected one end of a returning spring 24, the other end of which is connected to a. bracket 25. The

secured to the fixed segment 21. The universal bar is supported at its upper end by arms fixed on a transverse rock shaft, said arms lying parallel to the link 27. These bar, and at to a fixed bracket 31 which is arts are not shown as they are not claimed erein. A fixed dog 32 and a loose dog 33' mounted on the'rear face of the universal bar, control an escapement wheel 34 which is fixed on a shaft 35, which is geared to the carriage. c The mechanism thus far described is not claimed herein, such mechanism being claimed .in-other applications of mine copending herewith. 1

The shaft 35 is journaled near its ends in two frame plates 36 and 37 which are mounted on the back shelf 38.01 the main frame to v which they are secured by screws 39 (Fig. 2) threaded into lugs 40 rising from said shelf. A shaft 41 is j ournaled in the frame pieces 36 and 37, andon this shaft is journaled a spring drum 42- and a gear wheel 43 which is rigidly .connected to said spring drum and which meshes with a' feed 'rack 44 fixed to the under side of the carriage 5, said gear extendin through a slotin the top plate 3 and the ra 4. A driving sprin 45 is connected at its inner end to the shaft 41 and at its outer end to the drum 42, the connection being of such a sort that the spring may be mounted in the drum in such a way as to exert its tension to drive the carriage from right to left, or such that said spring may be mounted in said .drum-to exert its tension in the reverse direction, the spring itself being reversibly mounted in the drum. As shown in the present and 37. As shown in Fig. 2, a gear wheel 48, also fixed on the shaft 47, meshes with an idle gear 49 on a shaft 50, which is journaled in the frame plates 36 and 37, and said idle gear meshes with a pinion 51 whichis loosely mounted on the shaft of the esca ement wheel. The hub 52 of the pinion 51 Fig.1) is formed with ratchet teeth whichengage corresponding teeth on a sleeve 53 which is splined on the shaft 35, and which is pressed toward the hub 52 by a spring 54 which is coiled about the shaft 35 and compressed between said sleeve and. a collar 55 fixed on said shaft.

The construction is such that the pinion 51 is free to turn on the shaft 35 in one direction but not in the other. The shaft 41 has fixed thereon a ratchet wheel 56 which is engaged by a retaining pawl and by which the tension of the spring is controlled in a manner well known in the art.

The machine is shownlin Fig. 2 geared u to write such a language as Arabic, the fee ing mechanism bem adapted to feed the carriage from left to right as indicated by the arrows in Fig. 2. In order to gear the machine up to write such a language as English, the spring 45 would be disconnected from its screws or-hooks and turned around so as to exert its tension in the other direction as shown in Fig. 3, andthe ratchet wheel 56 i and its pawl would be correspondingly rea any change in except small versed; the idle pinion 49 would be removed from the machine, or, at least, moved out of gear, and the gear wheel 48 and pinion 51 would be replaced-by wheels 57 and 58 respectively of larger size so that they would mesh with each other, as shown in Fig. 3. The spring would then tendto drive the carriagefrorn right to left, but the escapement wheel and its shaft35 would still turn in the same direction as that indicatedv in Fig. 2.

It will thus be seen that the driving spring is reversible and that the gear which connects said s ring with the escapement wheel is changeablia. It will also be perceived that this change in the gearin does not require the castings or other framing of the machine, nor the use of any new parts, workin parts such as the gear 57 and'pinion 58. 6rdinarily, of course, in the manufacture of these machines, each machine would be geared u 'when firstassembled to suit the partic ar language which that machine was designed to Write but the .gearingof any machine could be changed at any time from one style to the other. In substituting the wheels 58 and 57 for the wheels 51 and 48, the velocity ratio of the shafts 35 and48 may be chan ed or not as desired according as it is desired to use a different or the same width of spacing.

The carriage and -its mounting shown in this case are claimed inmy application, Serial No. 214,625, filed June 29th,1904. Theescapement mechanism, including the stepped segmental universal bar having the feed dogs mounted thereon and co-operating with the rotary escapement member in the manner herein shown, are claimed in my application Serial No. 229,485, filed October 21, 1904. Certain features of the escapement mechanism are also claimed in myapplication Serial No. 272,197, filed August 1st, 1905. The type actionshown-in this case and the top plate formed to act as a dust guard for thetype bar bearings, are claimed in my application Serial No. 201,260, filed April 2nd, 1904.

Various changes in the details of construction and arrangement may be made without.

' de arting frornmy invention.

V'hat I claim as new and desire to secure. 9

by Letters Patent is 1. In a typewriting machine, the combination of a carriage; a reversibly mounted driving spring for said carriage; an escapement; and changeable gearing connecting said es- .capement and carriage.

2. In a typewriting machine, the combination of acarriag'e; a reversibly mounted driving spring geared to said carriage; a rotary escapement member; and gearing between saidrotary escapement member and carriage, such that said gearing may be changed when the spring is reversed so as to drive the escapement member in the same direction 1 when the spring is used to drive the carriage toward the right as when said spring is used to drive the carriage toward the left.

3. In a typewriting machine, the combination of a carriage; a spring drum geared to' said carriage; a driving spring reversibly mounted in said drum so as to drive the carriage either toward the right or toward the left; a rotary escapement member mounted .on a shaft having a pinion; and interchangeable gearing includmg said pinion whereby said shaft may be geared to turn in the same direction whether the spring is arranged to drive the carriage toward the right or toward the left.

4. In a typewritmg machine, the combination' of acarriage, a springdrum gearedto said carriage; a driving spring reversibly mounted in said drum so as todrive the carriage either toward the right or toward the left; a rotary escapement member mountedon a shaft having a pinion; interchangeable gearing includ g said pinion whereby said shaft maybe geared to turn in the same directhe carriage may be turned to initial position without turning said escapement mem- I tion ofa carriage a feed rack mounted on ber, whether the parts are arranged for a lefthand or a right-hand'feed.

5. In a typewriting machine, the combination of a carriage; a reversibly mounted driving spring geared to said carriage; a rotary escapement member; and a framework having gearing mounted therein, the construction and arrangement of the parts being such that said escapement member may be geared to said carriage by a train of gearing including an idle gear, when the spring is arranged to drive the carriage in one direction, or said idle gear may be omitted when the "spring is arranged to drive the carriage in the other direction.

' 6. Iii a typewriting machine, the combinasaid carriage; a spring drum geared to said feed rack at or near the middle of the machine; a driving spring reversibly mounted in said spring drum; a rotary escapement member and feed dogs co-operating therewith; I a frame; and interchangeable gearing mo tinted in said frame and connecting said feed rack with said escapement member, the construction and" arrangement being such that said driving spring ma be caused to feed said carriage in either irection and said escapement member may be geared to turn in the same direction, when thespring is arranged to drive one way as when said spring is arranged to drive the other'way.

7. In a typewriting machine, the combination of a spring drum geared to the carriage and having a driving spring mounted therein so that said spring drum will drive the carriage in one directionor the other according to the manner in which the spring is mounted in the drum, escapement mechanism including a rotaryescapement member, and interchangeable gearing between said carriage and said rotary escapement member, the construction and arrangement being such that said rotary escapement member may be geared to turn in the same direction whether I the driving spring operates to feed the carriage from right to left or from left to right.

Signed at Syracuse, in the county of Onondaga and State of New York, this third day of August A. D- 1905.

V ALEXANDER T. BROWN.

Witnesses:

ARTHUR J. BRIGGS, O. E. ToMLmsoNt 

